Public bug reported:

After upgrading Xubuntu from 19.10 to 20.04, some window operations (e.g. 
bringing one to foreground) can take an unusually long time (tenths of second, 
enough to compromise the general responsiveness of the system).
Even switching from one terminal window to another causes a 80-90% CPU spike 
due to Xorg. (Tested with xfce4-terminal as well as rxvt.)

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog:
 
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: XFCE
Date: Sat May 16 11:12:32 2020
DistUpgraded: 2020-05-09 17:20:01,127 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
DistroCodename: focal
DistroVariant: ubuntu
EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] RS880 [Radeon HD 4290] [1002:9714] 
(prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. RS880 [Radeon HD 4290] [1043:8454]
MachineType: System manufacturer System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-29-generic 
root=UUID=7ac7906b-f137-4adf-9de3-2ec128242354 ro
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to focal on 2020-05-09 (6 days ago)
dmi.bios.date: 04/13/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1301
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: M4A89GTD-PRO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1301:bd04/13/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A89GTD-PRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
modified.conffile..etc.default.apport: [modified]
mtime.conffile..etc.default.apport: 2017-10-10T22:39:42.917279
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101-2
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-2ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.6-1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal performance ubuntu

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1879042

Title:
  Xorg high CPU usage and stuttering on ubuntu 20.04

Status in xorg package in Ubuntu:
  New

Bug description:
  After upgrading Xubuntu from 19.10 to 20.04, some window operations (e.g. 
bringing one to foreground) can take an unusually long time (tenths of second, 
enough to compromise the general responsiveness of the system).
  Even switching from one terminal window to another causes a 80-90% CPU spike 
due to Xorg. (Tested with xfce4-terminal as well as rxvt.)

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: xorg 1:7.7+19ubuntu14
  ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
  Uname: Linux 5.4.0-29-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  BootLog:
   
  CasperMD5CheckResult: skip
  CompositorRunning: None
  CurrentDesktop: XFCE
  Date: Sat May 16 11:12:32 2020
  DistUpgraded: 2020-05-09 17:20:01,127 DEBUG Running PostInstallScript: 
'./xorg_fix_proprietary.py'
  DistroCodename: focal
  DistroVariant: ubuntu
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] RS880 [Radeon HD 4290] [1002:9714] 
(prog-if 00 [VGA controller])
     Subsystem: ASUSTeK Computer Inc. RS880 [Radeon HD 4290] [1043:8454]
  MachineType: System manufacturer System Product Name
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-29-generic 
root=UUID=7ac7906b-f137-4adf-9de3-2ec128242354 ro
  SourcePackage: xorg
  Symptom: display
  UpgradeStatus: Upgraded to focal on 2020-05-09 (6 days ago)
  dmi.bios.date: 04/13/2010
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1301
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: M4A89GTD-PRO
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1301:bd04/13/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM4A89GTD-PRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.family: To Be Filled By O.E.M.
  dmi.product.name: System Product Name
  dmi.product.sku: To Be Filled By O.E.M.
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer
  modified.conffile..etc.default.apport: [modified]
  mtime.conffile..etc.default.apport: 2017-10-10T22:39:42.917279
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.101-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.4-2ubuntu1
  version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.4-2ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.6-1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200226-1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

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